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122 lines
4.3 KiB
C++
Executable file
122 lines
4.3 KiB
C++
Executable file
/* ========================================
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* Flutter - Flutter.h
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* Copyright (c) 2016 airwindows, Airwindows uses the MIT license
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* ======================================== */
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#ifndef __Flutter_H
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#include "Flutter.h"
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#endif
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void Flutter::processReplacing(float **inputs, float **outputs, VstInt32 sampleFrames)
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{
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float* in1 = inputs[0];
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float* in2 = inputs[1];
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float* out1 = outputs[0];
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float* out2 = outputs[1];
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double overallscale = 1.0;
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overallscale /= 44100.0;
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overallscale *= getSampleRate();
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double depth = pow(A,2)*overallscale*70;
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double fluttertrim = (0.0024*pow(A,2))/overallscale;
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while (--sampleFrames >= 0)
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{
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double inputSampleL = *in1;
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double inputSampleR = *in2;
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if (fabs(inputSampleL)<1.18e-23) inputSampleL = fpdL * 1.18e-17;
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if (fabs(inputSampleR)<1.18e-23) inputSampleR = fpdR * 1.18e-17;
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if (gcount < 0 || gcount > 999) gcount = 999;
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dL[gcount] = inputSampleL; dR[gcount] = inputSampleR;
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int count = gcount;
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double offset = depth + (depth * pow(rateof,2) * sin(sweep));
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count += (int)floor(offset);
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inputSampleL = (dL[count-((count > 999)?1000:0)] * (1-(offset-floor(offset))));
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inputSampleL += (dL[count+1-((count+1 > 999)?1000:0)] * (offset-floor(offset)));
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inputSampleR = (dR[count-((count > 999)?1000:0)] * (1-(offset-floor(offset))));
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inputSampleR += (dR[count+1-((count+1 > 999)?1000:0)] * (offset-floor(offset)));
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rateof = (rateof * (1.0-fluttertrim)) + (nextmax * fluttertrim);
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sweep += rateof * fluttertrim;
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if (sweep >= (M_PI*2.0)) {sweep -= M_PI; nextmax = 0.24 + (fpdL / (double)UINT32_MAX * 0.74);}
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//apply to input signal only when flutter is present, interpolate samples
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gcount--;
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//begin 32 bit stereo floating point dither
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int expon; frexpf((float)inputSampleL, &expon);
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fpdL ^= fpdL << 13; fpdL ^= fpdL >> 17; fpdL ^= fpdL << 5;
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inputSampleL += ((double(fpdL)-uint32_t(0x7fffffff)) * 5.5e-36l * pow(2,expon+62));
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frexpf((float)inputSampleR, &expon);
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fpdR ^= fpdR << 13; fpdR ^= fpdR >> 17; fpdR ^= fpdR << 5;
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inputSampleR += ((double(fpdR)-uint32_t(0x7fffffff)) * 5.5e-36l * pow(2,expon+62));
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//end 32 bit stereo floating point dither
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*out1 = inputSampleL;
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*out2 = inputSampleR;
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in1++;
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in2++;
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out1++;
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out2++;
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}
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}
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void Flutter::processDoubleReplacing(double **inputs, double **outputs, VstInt32 sampleFrames)
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{
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double* in1 = inputs[0];
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double* in2 = inputs[1];
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double* out1 = outputs[0];
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double* out2 = outputs[1];
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double overallscale = 1.0;
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overallscale /= 44100.0;
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overallscale *= getSampleRate();
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double depth = pow(A,2)*overallscale*70;
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double fluttertrim = (0.0024*pow(A,2))/overallscale;
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while (--sampleFrames >= 0)
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{
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double inputSampleL = *in1;
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double inputSampleR = *in2;
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if (fabs(inputSampleL)<1.18e-23) inputSampleL = fpdL * 1.18e-17;
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if (fabs(inputSampleR)<1.18e-23) inputSampleR = fpdR * 1.18e-17;
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if (gcount < 0 || gcount > 999) gcount = 999;
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dL[gcount] = inputSampleL; dR[gcount] = inputSampleR;
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int count = gcount;
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double offset = depth + (depth * pow(rateof,2) * sin(sweep));
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count += (int)floor(offset);
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inputSampleL = (dL[count-((count > 999)?1000:0)] * (1-(offset-floor(offset))));
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inputSampleL += (dL[count+1-((count+1 > 999)?1000:0)] * (offset-floor(offset)));
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inputSampleR = (dR[count-((count > 999)?1000:0)] * (1-(offset-floor(offset))));
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inputSampleR += (dR[count+1-((count+1 > 999)?1000:0)] * (offset-floor(offset)));
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rateof = (rateof * (1.0-fluttertrim)) + (nextmax * fluttertrim);
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sweep += rateof * fluttertrim;
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if (sweep >= (M_PI*2.0)) {sweep -= M_PI; nextmax = 0.24 + (fpdL / (double)UINT32_MAX * 0.74);}
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//apply to input signal only when flutter is present, interpolate samples
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gcount--;
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//begin 64 bit stereo floating point dither
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//int expon; frexp((double)inputSampleL, &expon);
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fpdL ^= fpdL << 13; fpdL ^= fpdL >> 17; fpdL ^= fpdL << 5;
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//inputSampleL += ((double(fpdL)-uint32_t(0x7fffffff)) * 1.1e-44l * pow(2,expon+62));
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//frexp((double)inputSampleR, &expon);
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fpdR ^= fpdR << 13; fpdR ^= fpdR >> 17; fpdR ^= fpdR << 5;
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//inputSampleR += ((double(fpdR)-uint32_t(0x7fffffff)) * 1.1e-44l * pow(2,expon+62));
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//end 64 bit stereo floating point dither
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*out1 = inputSampleL;
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*out2 = inputSampleR;
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in1++;
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in2++;
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out1++;
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out2++;
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}
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}
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